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    <title>Document</title>
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    <script>
       /* document.write('hahahahah')
        var a = 1;
        document.write(typeof a);
        var b = '叹云兮:"这是缘 亦是命中注定的相见"'
        document.write(typeof b);
        var a = False;
        alert(typeof a)*/
        var name = '姜黎非';
        /*var phone= '23499048349';
        var msg='尊敬的'+name+'您好,您的手机号'+phone;
        document.write(msg)
        var gender = false;
        gender && document.write('girl')*/
        var score = 62;
        var grade = score === 100
        ? '太棒了! '
        : score>=90
            ? '优秀'
             :score >= 80
              ?'良'
               :score >=70
                ?'一般'
                 :score>=60
                  ?'及格'
                  :'不及格'
    </script>
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